I asked Emile to help me pick the winner of the chocolates. It took a few moments for him to understand what was required.
Then a lightening-fast draw!
And the winner is: Lawre!
Thank you all so much for the great comments, you were really helpful, and there were some splendid ideas! And Lawre, please email me so I can get your address, and I'll pop them in the post right away.
As a reward for his hard work, Emile got a carrot, his favourite snack, and just about the only thing he'll do tricks for.
Sit. Down. Roll over! Good boy!